The Americas
From the Amazon's blackwater basins to Caribbean reefs — the Americas hold the most popular freshwater biotopes and a wealth of Atlantic and Pacific saltwater life.
1,013 species
Sub-regions
King Angelfish
FishHolacanthus passer
A bold Eastern Pacific angel with a single dramatic white stripe across its flank.
King Conch
InvertAliger gigas
A gentle giant of the seafloor, with one of the most iconic shells in the ocean.
Kissing Prochilodus
FishSemaprochilodus insignis
A migratory Amazon grazer that plays a surprising ecological role in the wild.
Knife Livebearer
FishAlfaro cultratus
A tough little livebearer with a blade-like keel and a feisty personality.
Knobbed Brain Coral
CoralPseudodiploria clivosa
A hardy Caribbean brain coral with distinctively ridged, knobby colonies.
Knobbed Zoanthidean
CoralPalythoa mammillosa
A hardy Atlantic zoanthid with a distinctively bumpy, textured colony surface.
Knobby Cactus Coral
CoralMycetophyllia aliciae
A hardy Caribbean plate coral with bold texture and an easygoing nature.
Knobby Candelabra
CoralEunicea clavigera
A branching Caribbean gorgonian with distinctive knobbly texture and candelabra growth.
Knobby Candelabra
CoralEunicea tourneforti
A branching Caribbean gorgonian with bold, bumpy texture and dramatic candelabra form.
Knobby Candelabrum
CoralEunicea calyculata
A branching sea rod with distinctive knobbly texture, straight from Caribbean reefs.
Knob Coral
CoralFavia gravida
A compact Atlantic coral with tidy, rounded corallites and a warm pale orange hue.
Knob Coral
CoralMussismilia leptophylla
A hardy Brazilian reef coral with a distinctively knobbed, sculptural form.
Knobnose Whiptail Catfish
FishHemiodontichthys acipenserinus
The only catfish where dad carries the eggs on his lips.
Krauss' Basketmouth
FishCaquetaia kraussii
A predatory Colombian cichlid that lurks in swamps and ambushes its prey.
Krieg's Mini Tetra
FishOdontostilbe kriegi
A small, peaceful South American schooler that thrives in the mid-water column.
Kumakuma
FishBrachyplatystoma filamentosum
One of the largest freshwater fish on Earth, and reportedly a danger to humans.
Kyburz Tetra
FishPseudochalceus kyburzi
A peaceful Colombian schooler with a nippy streak worth planning around.
L12
FishAncistomus feldbergae
A rock-dwelling Xingu pleco that grazes algae by night and hides by day.
L128
FishHemiancistrus sp
A spot-patterned Orinoco pleco with a taxonomic identity that's still up for debate.
L200
FishBaryancistrus demantoides
A territorial Venezuelan pleco with vivid spots and a noticeably tall dorsal fin.
L234
FishMegalancistrus sp. "L234"
A massive, aggressive pleco from eastern Brazil that demands respect and space.
L239
FishBaryancistrus beggini
A tiny, dark-bodied pleco with an iridescent blue sheen from Guyana Shield rapids.
L260
FishHypancistrus sp. "L260"
A fine-patterned Tapajós pleco that breeds readily and stays compact.
Lace Lettuce Coral
CoralLeptoseris cailleti
A deep-water Atlantic coral bringing unusual twisted fronds to low-light reef tanks.
Lacrimostigmata Cory
FishCorydoras lacrimostigmata
A tiny armored catfish that may mimic its wild neighbors to blend in.
Lamarck's sheet coral
CoralAgaricia lamarcki
A low-light Caribbean plate coral with distinctive white star-shaped mouths.
Lambert's cory
FishCorydoras lamberti
A rare and enigmatic armored catfish from the Peruvian Amazon, best kept in groups.
Large Cactus Coral
CoralMycetophyllia lamarckiana
A Caribbean reef plate coral with a wonderfully textured, cactus-like surface.
Large Flower Coral
CoralMussa angulosa
A bold Caribbean coral with fleshy, dramatic polyps suited to most reef setups.
Largespot River Stingray
FishPotamotrygon falkneri
A venomous freshwater predator that can learn to recognize its keeper.
Lattice Dwarf Cichlid
FishNannacara taenia
A quietly charming dwarf cichlid hiding some fascinating breeding behavior beneath plain looks.
Laulao Catfish
FishBrachyplatystoma vaillantii
A river giant that needs a seriously big tank and equally big tankmates.
Leaf Coral
CoralAgaricia agaricites
A low-light Caribbean coral that forms sweeping plates and fronds in earth tones.
Leaf Coral
CoralAgaricia grahamae
A low-light reef plate coral that layers into graceful whorled formations.
Leaf Coral
CoralPavona chiriquiensis
A low-light Pacific coral with a textured, ridge-covered surface in earthy tones.
Leaf Coral
CoralPavona gigantea
A tough, low-light coral that thrives where other stony corals struggle.